Classic Item API 404

As of about two days ago (Sunday the 10th) the Item API has started returning unexpected errors when attempting to access the static-classic-us namespace.

With a request URL such as

(us host name. not adding since forum is preventing me from adding “links”)

, I get a 404 error. I’m able to replicate this via the API documentation testing tool, too. I’m able to use static-us, and for some, static-classic1x-us, but classic is giving me trouble. I’m unable to find any recent updates or release notes - is this a known issue? I’ve had code running against this API successfully with no changes for quite some time, so this is a bit of a surprise.

Same problem with static-classic-kr.
Can this be fixed? When will it be?